Cooks automatically



(No Model.) 4 SheetsSheet 1.

A '0. M. JARVIS. I MACHINE FOR GRINDING COOKS AUTOMATICALLY. No. 521,980. Patented June 26, 1894.

fififisiilfafd/w/a W1tnesses Inventor.

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AitorneyS (No Model.) 4 Sheets''Sheet 2..

G. M. JARVIS. MAGHINB FOR GRINDING COOKS AUTOMATICALLY.

Patented June 2 {1894.

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Witnesses:

Inventor.

V Attorneys 4 SheetS Shet a.v

(No Model.)

0. M. JARVIS. MACHINE FOR GRINDING COCKS AUTOMATICALLY.

No. 521,980. Patented June 26, 1894.

ivlhku x W aajfc far VVitnesses:

Attorneys THE NATIONAL LITNOGRAPHING COMPANY,

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(No ModeL) 4 SheetsSheet 4.

O. M. JARVIS. MACHINE FOR GRINDING COOKS AUTOMATICALLY.

No. 521,980. Patented June 26, 1894.

Uaajfdrwis'. 1 nventor.

\Vitnesses:

Attorneys COMPANY,

THE NATIONAL umoamwuuu UNITED STATES ATENT OFFICE.

CHARLES M. JARVIS, OF. ERIE, PENNSYLVANIA, ASSIGNOR 'OF ONE-HALF TO THE HAYS MANUFACTURING COMPANY, OE SAME PLACE.

MACHINE FOR GRINDING COCKS AUTOMATICALLY.

SPECIFICATION forming part of Letters Patent No. 521,980, dated June 26, 1894.

Application filed January 4,1894. Serial No. 495,688. (No model.)

To all whom it may concern.- 7

Be it known that I, CHARLES M. JARVIS, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsyl- Vania, have invented certain new and useful Improvements in Machines for Grinding Cocks Automatically; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a machine for automatically grinding cocks,- and the object that I have in view is to so combine a series of grinding mechanisms with asingle driving mechanism that a series of four cocks can be operated on at one and the same time, each grinding mechanism being so constructed that it can be stopped, started and controlled at the will of a single operator, without interference or hinderance from either of the other grinding mechanism so that the operator can inspect either of the cocks and if it is finished, take the same from the machine and replace it with another cock, without stopping the operation of grinding the remaining cocks in the machine, whereby the operator is required to attend to the four pieces of work in the machine and can accomplish more work in a given time than by other machines or processes known to me.

With these ends in view, my grinding mechauism consists in the combination with a driving shaft, of a spindle geared with said shaft and arranged to be driven continuously there byin a manner to rotate the spindle back and forth one and a quarter revolutions to each rotation of the driving shaft, a chuck carried by the spindle and coacting with a tail stock to support and rotate the plug of the cock to be ground, a shell-sustaining mechanism for holding the shell of the cock under tension and in position to be adjusted upon the plug to which rotary motion back and forth on its axis is imparted by the chuck and spindle, and mechanism operated by the driving shaft for imparting to the shell-holding mechanism a-reciprocating motion in order to adjust the shell onto the plug and withdraw the shell from the plug at certain intervals in order to free the sand from between the shell and plug, whereby'the plug has imparted to it an axial rotary back and forth motion and the shell has a reciprocating motion in line with the plug to efiect the proper grinding of the seat in the shell and to so furnish the plug as to properly fit said seat in the shell without producing any grooves or uneven surfaces in the plug or shell. mechanisms are embodied in my invention for the purpose of operating a number of cocks at one and the same time, and said series of grinding mechanisms are so combined with a single driving shaft that the spindles are continuously rotated thereby in the manner described while the plug-holdingchuck and shell sustaining mechanism of each of the series of grinding mechanisms can be thrown out of gear in order to permit of the removal of the finished cock and the insertion of a new cock to be ground without interference from either of the other grinding mechanisms which can remain in operation while the removal and insertion of the cooks is being effected in the grinding mechanism so arrested or thrown out of gear, each of the shellsustaining mechanisms being so arranged that they can be adjusted manually by the operator for the purpose of inspecting the work atany time to ascertain the condition and progress of the grinding operation My invention further consists in the peculiar mechanism by which the power from the driving shaft is transmitted to the chuck spindles; in the peculianform of chuck and its clutch mechanism by which the act of inserting the plug in the chuck serves to clutch the latter to the spindle and make the chuck fast therewith; in the novel form of the shellholding devices which enables the shell to be manually adjusted away from the plug at any stage of the operation of grinding in or- A series of these grinding der to inspect the work; and in the novel ment of my quadruplex cock grinding machine in the accompanying drawings, forming a part of this specification, and in which- Figure 1 is a top plan view of my machine. Fig. 2. is a side elevation. Fig. 3 is an end elevation. Figs. 4. and 5 are respectively a face View and a longitudinal sectional view, 1

on an enlarged scale, of my chuck, the clutch and spindle being shown by Fig. 5. Fig. 6 is a detail view of the clutch, in side elevation. Figs. 7 and 8 are detail views of the oscillating segment, and the rotary pinion adapted to be fixed to the spindle, forminga part of the transmitting mechanism between the driving shaft and one of the spindles, and Fig. 9 is a detail view of one of the levers forming a part of one of the shell-sustaining mechanisms.

Like letters and numerals of reference denote corresponding parts in all the figures of the drawings.

I employ two lathe-beds A, B, which are placed side by side, in parallel positions, and which are securely united together by transverse ties, a, see Fig. 1, to present a substantial foundation on which the whole operative mechanisms of the machine are contained.

On these parallel beds A, B, are mounted or castthe bearings c which are disposed near the middle of each bed, and in the bearings c of the bed A is mounted a longitudinal spindle 0 while in the bearings c of the other bed B is mounted another longitudinal spindle D, said spindles being indicated by dotted lines in Fig. l and shown by full lines in Fig. 5, and each spindle being so disposed that the ends thereof project beyond the bearings c onboth sides to enable each spindle to carry two chucks, one at each end thereof, whereby the two spindles are adapted to carry and operate the four chucks necessary for the quadruplex grinding mechanisms. These spindles O, D, are provided with driving wheels d, d, respectively, which are keyedor otherwise suitably fastened thereto at points between the bearings c on the lathe-beds A, B; and these driving wheels or pinions are arranged to engage with and be driven by the oscillating segments E, F, which are pivotally supported on the lathe-beds below the spindlesG, D in such manner that the arcshaped surfaces thereof will engage with the wheelsor pinions cl, d in order to rotate the latter and the spindles. These segments have their shanks pivoted or fulcrumed at their lower ends on suitable supports on the lathe beds so as to swing oroscillate back and forth a in apath at right angles across the longitudinal axes of the lathe-bedsand the longitudinal spindles mounted thereon, and said segments are coupled together for simultaneous operation by means of the link D which is connected by the wrist pins d to the segments which are operated by connections with the power shaft G. This power shaft is situated between the lathe-beds and journaled in suitable bearings 9 attached to or rigid with said lathe-beds, and on the shaft are mounted the fast and loose driving pulleys G, G, see Fig. 1. On one end of this shaft is fixed a disk, II, which rotates or turns with the shaft, and on this disk is provided a wrist pin 71. to which is connected one end of apitman F, the other end of which pitman is connected to the Wrist-pin d of one of the oscillating segments, F, whereby the power of the driving shaft is transmitted through the pitman to one of the oscillating segments and the latter in turn operates the other segment through the link Dso that the two segments turn the gears and the spindles simultaneously. The arcs of the segments, and the throw or movements of the segments, are so proportioned that the gears and spindles are turned one and a quarter revolutions in one direction as the segments move in one direction on ahalf revolution of the eccentric disk and power shaft; and as the power shaftand eccentric disk complete the revolution, the

connected segments are swung in the opposite direction to impart reverse movement to the gears and spindles for one and a quarter revolutions on the completion of the rotation by the power shaft, so that it will be seen each spindle is rotated alternately for one and a fourth revolution on each turn of the power shaft whereby the reciprocating shell is adapted to engage with the plug, rotating with the spindle, at different points and obviate the formation of grooves and produce the proper grinding of the plugseat and the plug.

Each grinding mechanism, of which four are provided in the machine, contemplates the provision for a chuck I, a mechanismfor holding and reciprocatingthe shell and to enable it to be moved manually by the operator away from the plug for the purpose of inspecting the work, and automatic mechanism for moving the shell-sustaining mechanism at predetermined intervals for the purpose of freeing the sand or other attrition material from between the shell or plug. The chucks I are carried on the ends of the two spindles G, D, one at each end thereof and each chuck is loosely mounted on the spindle and adapted to be automatically clutched thereto by the act of fitting the plug between the chuck and the tail stock. These tail stocks J, of which four are provided, are mounted on sliding beds at each end of the two lathe beds, opposite to and in line with the chucks on the spindles,as seen by reference to Fig. 1; and each tail stock has a longitudinally-moving rod j which has the usual centerj,the rodjbeing clamped in its hearing by a suitable clamp j" and the tail stock bed being held on the lathe-bed in the usual or any preferred way. I have illustrated the tail stocks as being of the common construction familiar to those skilled in the art to which this invention relates, but any suitable form of the tail stock can be used in my grinding machine. The end of the spindle C or D, is hollowed or bored out, as at 1, to provide a chamber, and the hub 2 of 'the chuck is fitted loosely onthe chambered end of the spindle so as to be movable freely back and forth on the spindle. Between the chuck and the spindle is interposed a spring 3 which bears at one end against the chuck and at its other end against the endwall of the chamber 1, in which chamber the spring is contained; andthe chuck is held or confined on the spindle, while capable of free back and forth movement thereon, by means of a pin or screw 4 which is fixed in the hub of the chuck and has its innerend fitted and operating in an angular groove or channel5 formed in the outside cylindrical surface of the spindle, see Figs. 5 and 6, whereby the chuck is prevented from being forced off the end of the spindle by the pressure of the spring 3 and at the same time the chuck can remain at rest or stationary, that is not partake of the rotary motions of the spindle, except when the chuck is made fast with the spindle, by means of the clutch-shown by Figs. 6 and 7.

This clutch consists of the fast and loose members 10, 11, one of the members, 11, being applied against the end of the chuck hub2 and made fast therewith by means of screws or in an equivalent manner, and the fast member 10 of the clutch is made rigid with the spindle so as to rotate therewith at all times, the member 10'being secured preferably by means of apin or screw 9 which passes through the clutch-member 10 and the spindle, as shown by Fig. 7.

In one of the members, 10, of the clutch are provided the notches or seats 8 and on the other member, 11, of the clutch are provided the lugs or projections 7 which are made to fit or take into the seats 8 when the square or polygonal end of the plug is fitted in the chuck and the latter is forced, along the spindle, against the pressure of the spring, so that the clutch members 10, 11 are engaged and the chuck is made fast to the spindle by the act of fitting the plug in the chuck.

On the front face of the chuck are provided the jaws 12, 13, which are made fast to the chuck-head by bolts or any other suitable means, and these jaws are so disposed relatively to each other that the square or poly onal end .of the plug can be fitted and gripped between them, to cause the plug when properly engaged with the tail-stock centerj and the chuck, to partake of the rotary back and forth motions imparted to the spindle by the driving mechanism between the spindle and power shaft.

The mechanism for sustaining and adjusting the shell or body of the cock consists of the lever N, the hook rods 15, 16, connected to the lever and adapted to engage with the cock-shell, and the weighted chains L, L provided with the hook-rods 17, 18, also adapted to engage with the cock body, the hook-rods of the lever and weighted chains extending in opposite directions from the cock body and serving to suspend or hold the cock body 1111- der-tension' between them. .These weighted chains are disposed on opposite sides of the spindle and chuck in a manner not to interfere withthe action of the rotary devices,

and they pass over guide rollers or pulleys 20 which are suitably journaled on the sides of the standards or bearings c on the lathe-bed,

and the lower ends of these chains sustain the multiple weights 21, 21, which can be changed or regulated so as to draw the cockshell or body with more or less force on the plug and to. vary the tension or contact between the shell and plug of the cock as may be found most desirable in the operation of grinding.

The shell or body of the cock, previous to its introduction in the machine, is fitted with the short nipples, indicated at 22 in Fig. 1 of the drawings, and these nipples extend in opposite directions from the body or shell so that the hook-rods 15, 16, of the lever and the similar rods 17, 18, of the weighted chains can be engaged with the shell or body of the cock; and to prevent said shell or body from partaking of the rotary motions of the plug when the shell is seated or fitted upon the plug to effect the grinding of theplug and its are disposed near the ends of the lathe-beds,

between the spindles and the tail stocks, see Figs. 1 and 2, and these levers are disposed centrally in relation to the lathe-beds, but they are constructed to enable them to operate in conjunction with the weighted chains and without interference with the tail-stocks. The lever N of one grinding mechanism is shown in detail in Fig. 9 of the drawings, and as will be seen it is constructed near the lower end with an elongated eye or loop at,

and with a similar elongated loop or eye n near its upper end; and said lever is further provided with the laterally extending arms 7?." and has its upper extremity formed into a handle n. The lever is arranged in an upright position to extend through the lathebed, or between the sides thereof, in such position that the tail-stock is adapted to pass through the upper loop or slot n of the le- IIO ver, and the hook-rods 15, 16, are connected to the lateral arms n" of said lever, the lowerextremity of the lever being fulcrumed to a shaft or pin at 25 supported by the pendent arm or arms 26 on'the lathe-bed, see Figs. 2 and 3.

It will be noted that the two levers N to each lathe-bed are arranged in line with each threaded portionp of the rdd and which nuts.

other and with the spindle journaled on the lathe-bed, and through the lower slots at of right hand levers passes the endwise movable rod, the rod for the lovers N on the right hand lathe-bed being shown at O in Figs. 1,

2, and Sand the rod for the left hand lathebed being indicated at P in Figs. 1 and 3.

These rods 0, P are reciprocated positively by the cams or eccentricsQ, Figs. 2 and 3 which "are operated by connection with the:

power shaft, and these rods 0,1? serveto impart oscillating motion to the series of four levers N so that the levers areautomatically moved at the tail-stocks a limited distance, say three-eighths of an inch, which movement of the levers is sufficient to pull upon the weighted chains and withdraw the cock bodies or shells fromoif theplugs in order to free or release the sand from betweeneach body and its plug and enable fresh sandto be supplied thereto according as the judgment of the attendant may dictate. The eccentrics Q, Q

are carried bya transverse shaft R which extendsacross from one lathe-bed to the other, and which is journaled in suitable bearings r bevel gearst',t",to one end of the power shaft,

the bevel gear '25 and 3 being of greater di-j ameter than the bevel gears t and s'with which they respectively intermesh in order.

that the rods 0 P, may be reciprocated once inevery four revolutions of the spindles and their chucks. The rodsO, P, are guided in suitable .pendentbrackets 0 on the lathe-beds, and to the rods 0, P, are connected the yokes or straps which encompass the eccentrics Q and by which the reciprocating movements are imparted to the rods. The right hand lever N is connected with its reciprocating rod by means ofnuts 19,19, which are fitted on the impinge or bear against the lever which, it will be noted, is drawn normally against the nuts by the weighted chains when the latter and the lever are connected by the hook rods to the shell or body of the cock, for operation. The left hand levers areeach arranged for operation by the opposite end of the endwise movable rod by having an adjustable threaded stemu attached thereto and arranged in the path of the free end of the endwise movable rod, the nuts andthe stem being adjustable relatively to the endwise movable rods so that the throw or movement of the whole series of leverscan be regulated and variedaccording to the extent of movement it is desired to impart to the shells or bodiesof the cooks in order to withdraw them from and force them upon their respective plugs. It will be noted that the weighted chains of the right-hand levers serve to draw the levers through the cockbody or shell, toward the right hand chuck and plug, and the left hand chainsserve to drawthe corresponding left hand levers toward the left hand chucks; and that the endwise movable rods O,'P, actuate the lovers automatically at certain intervals to withdraw.

each shell from its plug for a limited distance, which distance or movement can be regulated or Varied by-adjusting the nuts or threaded spindles of the levers, but at the sametime each lever canbe operated by hand to wholly withdraw the body or shell from its plug, in which case the weighted-chains move or give to its respective lever, whereby the operator can inspect the work to ascertain its condition and progress without stopping the rotationof the chuck and plug, in which condition the lever and weighted chains can "be looked, as by the pivoted catch 2), so that the plugcan be removed from the chuck and the finished cock taken from themachine-and re placed by another cock to be ground.

Although I have shown anddescribed the transverse shaft R, the eccentrics, the endwise movable rods, and the vertical shaft geared to the power shaft and "the transverse shaft as the preferred embodiment of the mechanism for imparting reciprocating motion to the endwise movable rods and to the levers, yet I do not strictly confine myself to the useof this specifiemechanism for imparting automatic reciprocating motion to the levers, as I am aware that-cams can bear-ranged to act directly against the levers, to force them positively in one direction anduse the weighted chains to draw the levers toward the chucks, saidcams being-carriedbyshafts geared to the power shaft.

In Figs. 7 and 8 of the drawingsl haveshown the oscillating segments and the driving pinions on the spindles G, D,as provided with intermeshing gear teeth, but'I can dispense with these noisy gear teeth and drive the pinions by frictional contact with the arc-shaped surfaces of the oscillating segments,as indicated in Figs. 1, 2 and 3 of the drawings in which case the pinion is made or its periphery faced with wood and the arc-shaped surface of the segment is faced with afriction material, such as rawhide, or any equivalent substance, in order to insure the necessary frictional contact between the segment and pinion, to drive the latter. The segment or the pinion may be so supported that they can be adjusted toward each other, to compensate for wear and insure the desired engagement with each other.

This being the construction of my machine, the operation maybe described as follows: The upright levers, N, are held or locked by the pivotedcatches in positionover the tail stocks, and power having beenapplied tothe fast pulley, the power shaft is driven to turn the crank disk and through the pitman and link, the segments and driving pinions are rotated so that the chucks and spindles have spindle.

the rotary back and forth motions for one and a quarter revolutions to each half rotation of the shaft. To place a cock in either one of the grinding mechanisms of the machine for grinding the plug and the plug-seat in the shell or body, the plug is first fitted in the chuck so that its polygonal end is confined or grlpped between the jaws thereof and the center of the tail stock is then brought up against the other end of the plug to force the chuck endwise on the spindle and cause it to be made fast with the spindle through the action of the clutch, after which the tail-stock center is clamped in place, thus causing the chuck and the plug centered between the chuck and the tail stock to rotate with the The body or shell of the cock, having the nipples 22 fitted in its opposite sides, is now connected to the hook rods 15, 16 of the lever; the hook rods of the weighted chains are now drawn up and connected to said nipples of the cock-body on the opposite side thereof to the hook rods of the lever; the water and sand applied to the cock-body and to the plug, and finally the pivoted catches are unclasped to release the levers and permit the weighted chains to draw the levers toward the chuck and force the body or shell upon the rotating plug, the nipples of the shell being fitted upon the stationary rests so that the shell will not partake of the rotary motions of the plug. The plug is turned axially in the cock-body back and forth in the manner described, and at certain intervals the lever is forced by the reciprocating mechanismaway from the chuck for a very limited distance sufficient to free the sand between the plug and the body of the cock; and this positive limited movement of the lever draws the body or shell and the weighted chains with said lever, after which the chains draw the lever and shell backward and force the plug into the seat in the body or shell for the purpose of continuing the grinding operation of the opposing faces of the plug and shell. The lever can be drawn by hand away from the chuck to raise the chains and withdraw the body from the plug, to permit the attend- 5 ant to inspect the work at any stage of its operation, and when the grinding is complete, the operator forces the lever backward and looks it in place, thus withdrawing the shell wholly from off the plug, the shell is detached from the rods of the chains and lever, the tailstock is released, and the plug taken out of the chuck to be replaced by another cock to be ground.

It will be observed that a series of four cocks can be ground at one time in my machine, and that as each of the grinding mechanisms can be controlled by the hand lever thereof, the work of inspecting and removing the ground cocks can be efiected Without interfering with the operation of grinding the remaining cocks.

I am aware that changes and alterations in the mechanisms herein shown and described scribed the machine as constructed to grind a series of four cocks at one time, yet it is evident that I can build the machine on the same principle to grind more than four cocks; hence my invention is not restricted to a machine in which any particular number of cocks can be simultaneously operated on.

Having thus fully described my invention,

what I-claim as new, and desire to secure by Letters Patent, is

1; In a machine for grinding cocks automatically, mechanism substantially as described for rotating the plug a complete revolution and fractional part thereof in one direction and an equal rotary motion in the reverse direction,'in combination with a lever disposed in axial alignment with said plugrotating mechanism and provided with means for attachment to one side of acock-shell or body, a yielding tension device adapted tobe connected to the opposite side of the cockshell or body and serving to normally move the lever toward the plug-rotating devices, and automatic devices to move the lever and the tension device away from the plug-rotating devices at certain intervals, substantially as and for the purposes described.

2. In a machine for grinding cocks automatically, the combination with a spindle carrying a chuck, a tail stock, and mechanism forimparting alternately-reversed rotary motions to said spindle and chuck, of the coacting lever and tension device arranged between the tail stock and said chuck, to move in axial alignment therewith, and each provided with fastenings adapted to connect with the respective sides of the cock-shell or body, and automatic devices for imparting reciprocating motion to said lever and tension device, whereby the cock-shell can be momentarily withdrawn from the plug and returned, by the tension-device, to have proper engagement, under pressure, with said plug, as described.

3. In a machinefor grinding cocks automatically, the combination with a spindle carrying a chuck and mechanism for rotating the same, substantially as described, of a lever havingmeans for attachment to 'a shell or body, the tension devices also having means for attachment with the shell or body, and mechanism for automatically moving the lever and tension devices a limited distance be connected to the opposite side of the shell, and which parts coact with the shell to hold the same under tension upon the plug and enable the shell to be withdrawn wholly from the plug, and mechanism for imparting to the shell-sustaining devices a limited reciprocating motion to partially withdraw the shell from the plug at certain regular periods, substantially as and for the purposes described.

5. In a machine for grinding cocks automatically, the combination of the spindles each provided with the chucks, the tailstocks disposed oppositely to the chucks, a driving mechanism common to said spindles and geared to impart alternately-reversed rotations thereto for equal periods, the shell-sustaining lever and tension device provided with means for engaging with the respective sides of a cock-shell and disposed between each of the chucks and its corresponding tail stock, in axial alignment therewith, and mechanism operated by the driving mechanism and connected with the shell-sustaining levers to impart reciprocating motion thereto in line with the spindles and tail stocks,substantially as and for the purposes described.

6. In a machine for grinding cocks automatically, the combination of the chuck-carrying spindle, the tail stocks in line with said spindles, a driving mechanism geared to said spindle to impart alternate-reversed rotary motions thereto, the coacting lever and tension device between each chuck and its tailstock and provided with means for engaging opposite sides of the cock-shell, a vertical shaft geared to said driving mechanism, a cam shaft geared to the vertical shaft, and connections between the levers and said camshaft to impart reciprocating motion to each lever at certain periods during the rotation of the corresponding chuck, substantially as and for the purposes described.

7. In a machine for grinding cocks automatically, the combination of the chuck-carrying spindle, a tail-stock, a driving mechanismfor imparting alternately-reversed rotary motions to the spindle, the coactinglever and tension device having means for engagement with the cock-shell, and the transmitting automatic mechanism geared to the driving mechanism and provided with adjustable con nections for said vibrating lever to vary the throw or movement thereof, substantially as and for the purposes described.

8. In amachine for grinding cocks automatically, the combination with the chuckcarrying spindles, the tail-stocks therefor, and the driving mechanism geared to said spindles, of the coacting lever and tension device between each chuck and its tail-stock and having means for engaging with opposite sides of the cock-shell, the vertical shaft geared to the driving mechanism, the transverse cam-shaft geared to said vertical-shaft, and the reciprocating rods actuated by said cam shaft and having means engaging with the levers to vibrate the same, for the purposes described, substantially as set forth. 9. In a machine for grinding cocks automatically, the combination with the parallel chuck-carrying spindles of a driving shaft between said spindles, the oscillating segments each pivoted at one end and having its areshaped surface geared to one of the spindles, connections between the driving shaft and the segments to impart oscillating motion s1- multaneousl y thereto, a tail stock opposite to each chuck, a coacting lever and tension device constituting a shell-sustaining device between each chuck and its tail stock, and means for automatically reciprocating each lever and its tension device, substantially as and for the purposes described.

10. The combination with a recessedspindle, and a tail stock in line therewith, of a slidable non-rotatable chuck fitted looselyon said recessed end of the spindle, a spring seated in said recessed spindle and normally pressing against the slidable chuck, and means for making the clutch fast to the spindle by the adjustment of the work between the tail stock and the slidable chuck, substantially as and for the purposes described. 11. The combination with a spindle,and a tail stock in alignment therewith, of a nonrotatable chuck loosely fitted on said spindle and slidably connected thereto,1a spring normally acting on the chuck to force the same to the limit of adjustment permitted by the slidable connection between the chuck and spindle, and a clutch having one member fast to the spindle and the other memberfast to the slidable chuck and said members being spaced to engage with each other by the endwise movement of the chuck as thework is adjusted between thechuck and tail stock, substantially as and for the purposes described.

12. The combination of a spindle, aslidable chuck fitted loosely thereon and connected by a slide joint therewith to permit the chuck to have a limited movement on the spindle and to enable the latter to rotate without rotating the chuck, a clutch having its members fast with the spindle and the chuck, respectively, and a spring interposed between the spindle and the chuck, for the purposes described, substantially as set forth. i

13. The combination of a spindle provided with a hollow spring-seat in its end, a slidable chuck fitted loosely upon said end of the IIC spindle and connected by a slide joint theremeeting said lever with a shell or body of the cook, the weighted chains guided by suitable rollers and having means to engage with the shell or body of the cock, and the fixed rests disposed to engage with the shell or body and prevent it from rotating on the same as the,

shell is fitted upon the plug, substantially as and for the purposes described.

15. In a machine for grindingcocks automatically, the combination with the spindles, the chucks, and the tail stocks, of the levers and weighted chains arranged to sustain the shells or bodies of the cocks in operative positions relative to the plugs between said chucks and tail stocks, the transverse shaft having the cams for imparting limited movement-to the series of levers during certain periods of the grinding operations, a power shaft, and countershaft geared to the power shaft and to the transverse shaft, substantially as and for the purposes described; 16, In a machine for grinding cocks automatically, the combination with mechanism for rotating the plugs, of the shell-sustaining devices having the levers, the power shaft, a transverse cam shaft driven through intermediate gearing from said power shaft, reciprocating rods operated by cams on the transverseshaft, and adjustable connections between said rods and said levers to vary and regulate the throw of the levers and the movement of the shell-sustaining devices, substantially as and for the purposes described.

17. In a machine for grinding cocks automatically, the combination with mechanism for imparting alternately reversed rotary motions to a series of plugs, of the shell sustainingdevices having the levers, a transverse shaft provided with cams or eccentrics, the reciprocating rods having means for rocking the lovers of the shell-sustaining devices and arranged to be operated by the cams or eccentrics of the transverse shaft, a power shaft, and a countershaft geared to the power and transverse shafts to actuate the rodsand 1evers at certain periods during the rotations of the plug mechanism, substantially as and for the. purposes described.

In testimony whereof I affix my signature in presence of two witnesses.

CHAS. M. JARVIS.

Witnesses:

' HENRY A. CLARK,

J No. M. GLAZIER. I 

